Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0693df999efea5…

MALICIOUS

PDF

77.3 KB Created: 2021-04-08 05:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f35e4e2a6de6e3609bf75426c43bf4b SHA-1: ded5ec3b48bb595b6b9dd4eb8a93273fd713e9bf SHA-256: cb0693df999efea5f82f4ffa65b1d57522e2adbbdcdd0cadfa375ce915fd86fd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document contains a large number of external links, many hosted on disposable domains, forming a link farm. The embedded URLs are likely used to redirect users to malicious websites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kuzutuzo.ru/strik?utm_term=definicion+de+t%25C3%25A9cnicas+e+instrumentos+de+recolecci%25C3%25B3n+de+datos PDF link annotation
    • https://cdn.sqhk.co/gejupajo/fghi7xg/62204345791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402710/normal_5ff5f6f57f02c.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/sjbhgge/11742795032.pdfIn PDF document text
    • http://zefutuwukeras.getenjoyment.net/96103572411.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/messages_1_workbook.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/VDBwuge/hungry_fish_math_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/eyPWgjt/79130512902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_600c7dcfa72c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_6041fd267ad56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460461/normal_6026d6c6eb49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_606bc4c2713b8.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/cKccfZR/vabovitijumajufu.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/d5Zhdia/mekasuxogitifoso.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/6Nshchi/at_t_u_verse_customer_support_internet.pdfIn PDF document text
    • https://cdn.sqhk.co/bafiweba/RjhUjjx/86299963477.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_3f22e81a91fd425ba90257a83ee8f5d4.pdf?index=trueIn PDF document text
    • http://bixozebaxikapos.atwebpages.com/50814415943.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_7ebf7e4c6c0048c18e70e4dff92a3122.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07C 5324 bytes
SHA-256: 1ee05ffbe23d6aa6a670e643869c6505b8b5511bcd50fff8811541b23863426c
font_01_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 11084 bytes
SHA-256: b8691de90fdae7639d846a6d36b4c1cacfe39ba023d9d9889bd4564981652023
font_02_sfnt_off00011641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11641 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.